lkml.org 
[lkml]   [2001]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH for 2.5] preemptible kernel
    On Wed, 21 Mar 2001, Keith Owens wrote:
    > I misread the code, but the idea is still correct. Add a preemption
    > depth counter to each cpu, when you schedule and the depth is zero then
    > you know that the cpu is no longer holding any references to quiesced
    > structures.

    A task that has been preempted is on the run queue and can be
    rescheduled on a different CPU, so I can't see how a per-CPU counter
    would work. It seems to me that you would need a per run queue
    counter, like the example I gave in a previous posting.

    Nigel Gamble nigel@nrg.org
    Mountain View, CA, USA. http://www.nrg.org/

    MontaVista Software nigel@mvista.com

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:29    [W:0.651 / U:0.048 seconds]
    ©2003-2011 Jasper Spaans. Advertise on this site